What's the difference between a pathogenic virus and a harmless one?

How will you manage your time to accomplish the necessary tasks both on the job and at home?

What element is able to combine with itself and hydrogen to form large molecules ?

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.